feat(0.4.25API): adds token payment for cached queries

provable-things · Jun 10, 2019 · 9d5ea28 · 9d5ea28
1 parent 4c88e75
commit 9d5ea28
Showing 1 changed file with 21 additions and 0 deletions.
diff --git a/oraclizeAPI_0.4.25.sol b/oraclizeAPI_0.4.25.sol
@@ -4667,6 +4667,27 @@ contract usingOraclize {
         return oraclize.queryCached.value(_queryPrice)();
     }
 
+    function oraclize_token_queryCached(uint256 _queryPrice)
+        oraclizeAPI
+        internal
+        returns (bytes32 _queryId)
+    {
+        settleERC20Payment(_queryPrice);
+        return oraclize.queryCached();
+    }
+
+    function settleERC20Payment(uint256 _queryPriceInEth)
+        private
+    {
+        address tokenAddress = oraclize
+            .addressCustomPaymentToken(address(this));
+        ERC20Interface(tokenAddress)
+            .transfer(
+                address(oraclize),
+                oraclize.convertToERC20Price(_queryPriceInEth, tokenAddress)
+            );
+    }
+
     function oraclize_getDatasourceByte(
         string memory _datasourceString
     )